- Simple in Design (Standardized size available)
- Hydraulic path is simpler (No distributor for tubular)
- No Complicated parts
- Even distribution of load on foundation (as turbine load come at different place and generator load at different place etc.,)
- Better efficiency for lesser MW project (as flow is straight and Hydraulic passage is of lesser restriction to flow.
Advantage in Layout:
- Simpler Layout (all auxiliary equipment can be placed in one floor and close to main generating equipment - Better coordination by operator)
- Entire equipment is directly under crane hook making approach very easy for erection, maintenance - Reduce down time during maintenance.
Advantage in Supply:
- As design is simpler and standardized, quicker delivery period.
- All equipment can be supplied in 6 to 12 months.
- Saving in delivery period of the order of about 6 months
Advantage in Erection:
- Erection time is less (as equipment distributed on one floor)
- Machine (turbine as well as generator) can be fully assembled in shop / service bay and lowered to foundations.
- Results in shorter erection & commissioning time (3 to 6 months)
Advantage in Operation:
- Easier control and vigil (operator sitting in control room can see all the equipments and can take preventive shutdown, if required)
- No skilled personnel are required. As no complex parts are involved thus, easy to understand the parts and system.
Advantage in Maintenance:
- Simple design; hence availability of spares is easy.
- Easy Maintenance; All equipment are exposed in Horizontal formation thus can be maintained independently like turbine & Generator independently.
- Also the Turbine is exposed (not fully buried in concrete) thus inspection, repair, maintenance etc., is easier.
Horr. Francis Arrangement